VPN over NAT readme =========================================================== * What is NAT? Network Address Translation (NAT) allows the RG-1000 and RG-1100 to share a single IP connection across multiple computers. In a network installation with NAT, the RG will share internet access via the wired connection (modem or Ethernet). The local computers will connect to the RG via their wireless cards. Each of the local computers will be given an IP address by the RG. The default range for NAT addresses is 10.0.1.2, 10.0.1.3, etc. ----------------------------------------------------------- * What is a VPN? A Virtual Private Network (VPN) allows a secure connection to be established between a computer and a remote network. To the computer user, it appears as if he or she is directly connected to the remote network. Any person eavesdropping on the traffic going between the computer and the remote network will be unable to understand the traffic since it is encrypted. There are many networking protocols that allow the creation of a VPN: IPSEC, PPtP and L2TP are common examples. The RG supports IPSec, PPtP and L2TP over NAT. ----------------------------------------------------------- * What is VPN over NAT? In a home environment where a single internet connection is shared among multiple computers by using NAT, a VPN client on one of the computers cannot typically connect to the VPN, since NAT and VPN by default conflict with each other. An additional feature, called VPN over NAT (also known as VPN Pass-through), has been added to the RG. It allows certain types of VPN clients to connect to remote VPN servers. ----------------------------------------------------------- * What types of VPNs are supported? The RG supports IPSec over NAT for IPSec ESP tunnel mode (consult your VPN solution provider to find out if they use ESP tunnel mode). Both the key exchange protocol (ISAKMP) and the actual IPSec data are supported over NAT. Additionally L2TP and PPtP are supported as well. Note that some VPN solutions will not work in tunnel modem over NAT if the VPN Client's cookie includes the local IP address. In this case the concentrator will refuse to continue since it detects a difference in the IP address in the cookie (local LAN IP address) and the source IP address of the packet (RG IP address). Some VPN solutions allow configuring what information to use for creating of cookies (e.g. Linux FreesWAN). By specifying to use other data then the IP address the problem described above can be prevented. VPN over NAT has been succesfully tested with several different solutions, including: - Lucent Brick VPN Firewall - Avaya VSU VPN Gateway - Cisco VPN Solution - Windows 2000 professional - Nortel Contivity - Linux FreesWAN ----------------------------------------------------------- * How is VPN over NAT enabled? VPN over NAT does not need to be explicitly configured. It is automatically performed when 1. NAT is enabled on the RG. 2. IPSec, L2TP or PPtP traffic is detected by the RG. ----------------------------------------------------------- * What to do if my VPN over NAT is not working? When your VPN over NAT is not working an alternative when using an external device is to put the RG in transparent bridge mode (by disabling NAT). In this mode the RG passes all protocols (including VPN related protocols) without alterations. Note that in this case you can only set up a single VPN connection per IP address allocated by your provider. ----------------------------------------------------------- * Known issues Some VPN Clients only allow network traffic to go through the VPN tunnel. This will block traffic to the rest of the network including the RG itself. If the RG is setup to handle DHCP requests also these DHCP request do not end up in the RG. As a result DHCP lease times will never be extended when expired. A work around is the set the DHCP lease time to a high value. This will work assuming the LAN station obtained an IP address before activating the VPN Client.Download Driver Pack
After your driver has been downloaded, follow these simple steps to install it.
Expand the archive file (if the download file is in zip or rar format).
If the expanded file has an .exe extension, double click it and follow the installation instructions.
Otherwise, open Device Manager by right-clicking the Start menu and selecting Device Manager.
Find the device and model you want to update in the device list.
Double-click on it to open the Properties dialog box.
From the Properties dialog box, select the Driver tab.
Click the Update Driver button, then follow the instructions.
Very important: You must reboot your system to ensure that any driver updates have taken effect.
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